Troubleshooting Guide - Trane XT500C Installer's Manual

3. Press Increase again to display the software
identification code.
(Example: 200 = software ID code 200)
4. Press Increase again to display the software revision
number (Example: 001=Revision number 1).

TROUBLESHOOTING GUIDE

Symptom Possible Cause
Display will not come Thermostat is not being
on. powered.
Temperature display is Room temperature
incorrect. display has been
reconfigured.
Thermostat is configured
for °F or °C display.
Bad thermostat location.
Temperature Internal temperature
displaying digits as measurement failure.
dashes (---).
The upper or lower
Temperature settings
temperature limits were
will not change.
reached.
(Example:
Cannot set the
The setpoint temperature
heating higher or the
range stops were
cooling lower.)
configured.
Heating will not come No power to the
on. thermostat.
XT500C DELUXE PROGRAMMABLE HEAT-PUMP THERMOSTAT
5. Press the Increase
identification number. (Example: 314 = Model ID 314)
M14615
6. Press Run Program to exit the self-test. The self-test
mode times out 5 minutes after the last key press.
CHECKOUT
Outdoor Temperature Sensor
(optional accessory)
Expose the outdoor temperature to outdoor air for a minimum
of five minutes before reading.
M14616
Action
Check for 24 Vac between R and W terminals.
Check if the circuit breaker is tripped—reset the circuit breaker.
Check if the system fuse is blown—replace the fuse.
Check if the power switch on the HVAC equipment is in the Off
position—set to the On position.
Check wiring between thermostat and HVAC equipment—replace any
broken wires and tighten any loose connections.
If 24 Vac is present, proceed with troubleshooting.
Enter Installer Setup number 37 and reconfigure the display.
Enter Installer Setup number 14 and reconfigure the display.
Relocate the thermostat.
Contact distributor or retailer.
Check the temperature setpoints:
Heating limits are 55 to 85°F (13 to 29°C).
Cooling limits are 65 to 99°F (18 to 37°C).
Check Installer Setup numbers 34 and 35 and reconfigure the
setpoint stops.
Check for 24 Vac between R and W terminals.
If missing 24 Vac:
Check if the circuit breaker is tripped—reset the circuit breaker.
Check if the system fuse is blown—replace the fuse.
Check if the power switch on the HVAC equipment is in the Off
position—set to the On position.
Check wiring between thermostat and HVAC
equipment—replace any broken wires and tighten any loose
connections.
If 24 Vac is present, proceed with troubleshooting.
11
again to display the model
M14617
( continued )
Pub. No. 18-HD25D2-2
69-1404